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Portable Network Graphic  |  1993-05-04  |  100KB  |  816x1056  |  8-bit (255 colors)
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OCR: Copyright Paul D. Bain 1993 encrypted data be decrypted with the old key and encrypted with the new key Triple encryption and key management are not reauired for DES use but they do improve the security DES affords DES's security has been the subject of severe criticism since it emerged in 1977. The primary criticism of DES is that it does not provide genuine protection. Critics have argued that the DES 52-bit key does not provide adequate security against an exhaustive secret key search. An exhaustive search, however requires a degree of computer power that is by no means common Critics have also argued that DES does not provide genuine protection because it requires disclosing the secret key to other parties. These critics have contended that key management further inhibits actual securi ...